compose [nfc]: Rename controller classes

I'll be giving these a common base class, and with the current
pattern the natural name would be ComposeTextEditingController...
which would look far too close to ContentTextEditingController.

Instead, rename them to a pattern where they can each have the
base class's name plus a word.

Author: gnprice

lib/model/autocomplete.dart

@@ -7,7 +7,7 @@ import '../widgets/compose_box.dart';
 import 'narrow.dart';
 import 'store.dart';
 
-extension Autocomplete on ContentTextEditingController {
+extension Autocomplete on ComposeContentController {
   AutocompleteIntent? autocompleteIntent() {
     if (!selection.isValid || !selection.isNormalized) {
       // We don't require [isCollapsed] to be true because we've seen that

lib/widgets/compose_box.dart

@@ -27,7 +27,7 @@ enum TopicValidationError {
   }
 }
 
-class TopicTextEditingController extends TextEditingController {
+class ComposeTopicController extends TextEditingController {
   // TODO: subscribe to this value:
   //   https://zulip.com/help/require-topics
   final mandatory = true;
@@ -67,7 +67,7 @@ enum ContentValidationError {
   }
 }
 
-class ContentTextEditingController extends TextEditingController {
+class ComposeContentController extends TextEditingController {
   int _nextUploadTag = 0;
 
   final Map<int, ({String filename, String placeholder})> _uploads = {};
@@ -159,7 +159,7 @@ class _ContentInput extends StatefulWidget {
   });
 
   final Narrow narrow;
-  final ContentTextEditingController controller;
+  final ComposeContentController controller;
   final FocusNode focusNode;
   final String hintText;
 
@@ -239,8 +239,8 @@ class _StreamContentInput extends StatefulWidget {
   });
 
   final StreamNarrow narrow;
-  final ContentTextEditingController controller;
-  final TopicTextEditingController topicController;
+  final ComposeContentController controller;
+  final ComposeTopicController topicController;
   final FocusNode focusNode;
 
   @override
@@ -304,7 +304,7 @@ class _File {
 
 Future<void> _uploadFiles({
   required BuildContext context,
-  required ContentTextEditingController contentController,
+  required ComposeContentController contentController,
   required FocusNode contentFocusNode,
   required Iterable<_File> files,
 }) async {
@@ -365,7 +365,7 @@ Future<void> _uploadFiles({
 abstract class _AttachUploadsButton extends StatelessWidget {
   const _AttachUploadsButton({required this.contentController, required this.contentFocusNode});
 
-  final ContentTextEditingController contentController;
+  final ComposeContentController contentController;
   final FocusNode contentFocusNode;
 
   IconData get icon;
@@ -529,8 +529,8 @@ class _StreamSendButton extends StatefulWidget {
   });
 
   final StreamNarrow narrow;
-  final TopicTextEditingController topicController;
-  final ContentTextEditingController contentController;
+  final ComposeTopicController topicController;
+  final ComposeContentController contentController;
 
   @override
   State<_StreamSendButton> createState() => _StreamSendButtonState();
@@ -668,8 +668,8 @@ class _StreamComposeBox extends StatefulWidget {
 }
 
 class _StreamComposeBoxState extends State<_StreamComposeBox> {
-  final _topicController = TopicTextEditingController();
-  final _contentController = ContentTextEditingController();
+  final _topicController = ComposeTopicController();
+  final _contentController = ComposeContentController();
   final _contentFocusNode = FocusNode();
 
   @override

test/model/autocomplete_checks.dart

@@ -2,7 +2,7 @@ import 'package:checks/checks.dart';
 import 'package:zulip/model/autocomplete.dart';
 import 'package:zulip/widgets/compose_box.dart';
 
-extension ContentTextEditingControllerChecks on Subject<ContentTextEditingController> {
+extension ComposeContentControllerChecks on Subject<ComposeContentController> {
   Subject<AutocompleteIntent?> get autocompleteIntent => has((c) => c.autocompleteIntent(), 'autocompleteIntent');
 }
 

test/model/autocomplete_test.dart

@@ -15,7 +15,7 @@ import 'test_store.dart';
 import 'autocomplete_checks.dart';
 
 void main() {
-  group('ContentTextEditingController.autocompleteIntent', () {
+  group('ComposeContentController.autocompleteIntent', () {
     parseMarkedText(String markedText) {
       final TextSelection selection;
       int? expectedSyntaxStart;
@@ -67,7 +67,7 @@ void main() {
         ? 'in ${jsonEncode(markedText)}, query ${jsonEncode(expectedQuery.raw)}'
         : 'no query in ${jsonEncode(markedText)}';
       test(description, () {
-        final controller = ContentTextEditingController();
+        final controller = ComposeContentController();
         final parsed = parseMarkedText(markedText);
         assert((expectedQuery == null) == (parsed.expectedSyntaxStart == null));
         controller.value = parsed.value;